A wall of dimensions 3m * 12cm * 7m is to be made by using bricks of dimesions 25cm * 12cm * 10cm. How much bricks are required to construct the wall?

(a) 825

(b) 820

(c) 850

(d) 840

I had been asked this question in an online quiz.

My query is from Volume of a Cuboid in section Surface Areas and Volumes of Mathematics – Class 9

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